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1.从化学反应速率和化学平衡两方面考虑,合成氨应采用的条件是( ). A.低温、高压、催化剂B.低温、低压、催化剂C.高压、高温D.适当温度、高压、催化剂2.可逆反应A+3B(?)2C+D,在不同条件下反应速率如下,其中反应进行得最快的是( ). A.vA=0.5 mol·L-1·s-1 B.vB=0.5 mol·L-1·s-1 C.vC=0.4 mol·L-1·s-1 D.vD=0.45 mol·L-1·s-1 3.在一定温度下,可逆反应A(g)+3B(g)(?)2C(g)达到平衡的标志是( ). A.C的生成速率与C的分解速率相等B.A、B、C的浓度不再变化
1. Considering chemical reaction rate and chemical balance, the conditions for ammonia synthesis should be (). A. Low temperature, high pressure, catalyst B. Low temperature, low pressure, catalyst C. High pressure, high temperature D. Appropriate temperature, high pressure, catalyst 2 Reversible reaction A+3B(?)2C+D, the reaction rate is as follows under different conditions, in which the reaction proceeds fastest (). A.vA=0.5 mol·L-1·s-1 B.vB= 0.5 mol·L-1·s-1 C.vC=0.4 mol·L-1·s-1 D.vD=0.45 mol·L-1·s-1 3. At a certain temperature, reversible reaction A (g )+3B(g)(?)2C(g) is the sign of equilibrium (). The rate of generation of AC is equal to the rate of decomposition of C. The concentrations of BA, B, and C no longer change.